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    • Porsche 997 C4S dynos before and after exhaust, headers, and custom OE Tuning tune, +18.4 AWHP

      The vehicle here used in the baseline is a stock motor 997 C4S on 91 octane. It does have 19 inch HRE wheels and lowering springs. The car was dyno'd first without any changes and then the AWE-Tuning exhaust and headers were added. After that, OE Tuning did their custom dyno tune. The car gained 18.4 whp from the baseline. Remember, these gains are at all 4 wheels on a dyno dynamics dyno in case you are wondering why a Carrera 4S is not putting out more. It is also a tiptronic transmission which you can see shift in the dyno and the trans does suck a bit of power.

      This article was originally published in forum thread: Porsche 997 C4S dynos before and after exhaust, headers, and custom OE Tuning tune, +18.4 AWHP started by Sticky View original post
      Comments 3 Comments
      1. Sorena's Avatar
        Sorena -
        the headers & exhaust gains are pretty weak, I expected more.
        but the Tune changes are good, shows you should go for a good tune in the first step not exhaust if you are on budget.
      1. DBFIU's Avatar
        DBFIU -
        wow the C4S is underpowered as $#@!, not bad gains for tune though...
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        wow the C4S is underpowered as $#@!, not bad gains for tune though...
        Conservative dyno, AWD car, + auto transmission. Not exactly a tour de force but many people have these and might want more out of them.

        Gains are decent.